CN116386552A

CN116386552A - Backlight control method, system, terminal equipment and storage medium

Info

Publication number: CN116386552A
Application number: CN202310402396.1A
Authority: CN
Inventors: 周建华; 黄少华; 胡向峰; 陈元晟; 廖明星; 王卫国; 蓝善和
Original assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Current assignee: Shenzhen Skyworth RGB Electronics Co Ltd
Priority date: 2023-04-11
Filing date: 2023-04-11
Publication date: 2023-07-04

Abstract

The application discloses a backlight control method, a system, a terminal device and a storage medium, which are applied to a backlight control system, wherein the backlight control system comprises a driving chip integrated with a temperature detection module and a mini light emitting diode; the backlight control method comprises the following steps: acquiring a first temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection; comparing the first temperature value with a preset first temperature threshold value; and if the first temperature value is higher than the first temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, wherein the first preset current value corresponds to the first temperature threshold value. The technical scheme of the application realizes the effect of reducing the production cost of the AM Mini-LED on the basis of ensuring the reliability of the AM Mini-LED.

Description

Backlight control method, system, terminal equipment and storage medium

Technical Field

The present disclosure relates to the field of electronic products, and in particular, to a backlight control method, a system, a terminal device, and a storage medium.

Background

The Mini-LED (Mini-light emitting diode Mini light emitting diode) backlight technology is divided into an AM Mini-LED (active matrix driving Mini-LED) and a PM Mini-LED (passive matrix driving Mini-LED) main stream technology, and in practical application, the LED partition of the AM Mini-LED is higher, so that better watching experience can be brought to users, and the AM Mini-LED is widely appreciated.

However, the driving chip of the AM Mini-LED is placed in the backlight module, the heat dissipation condition is poor, and the packaging of the driving chip of the AM Mini-LED is smaller, so that in order to ensure the reliability of the AM Mini-LED, a manufacturer of the AM Mini-LED needs to de-rate the driving chip so that the stress (electric stress and temperature stress) born by the application of the components is lower than the rated value of the components, thereby delaying the parameter degradation of the components and prolonging the service life. However, more driving chips are needed to drive the AM Mini-LEDs, so that the problem of high production cost of the AM Mini-LEDs is caused.

Disclosure of Invention

The main purpose of the application is to provide a backlight control method, a system, a terminal device and a storage medium, aiming at realizing the effect of reducing the production cost of an AM Mini-LED on the basis of guaranteeing the reliability of the AM Mini-LED.

In order to achieve the above object, the present application provides a backlight control method applied to a backlight control system including a driving chip integrated with a temperature detection module and a mini light emitting diode;

the backlight control method comprises the following steps:

acquiring a first temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection;

comparing the first temperature value with a preset first temperature threshold value;

and if the first temperature value is higher than the first temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, wherein the first preset current value corresponds to the first temperature threshold value.

Optionally, the backlight control system further comprises a micro control unit, wherein the micro control unit is connected with a driving chip set formed by mutually serially communicating a plurality of driving chips;

after the step of obtaining the first temperature value of the driving chip, which is obtained by the temperature detection module through temperature detection for the driving chip, the method further includes:

comparing the first temperature value of each driving chip in the driving chip group to determine the maximum temperature value in the driving chip group;

And transmitting the maximum temperature value to the micro control unit so that the micro control unit compares the maximum temperature value with a preset system temperature threshold value, and if the maximum temperature value is higher than the system temperature threshold value, controlling a driving chip corresponding to the maximum temperature value to reduce the driving current output by the driving chip to the mini light emitting diode to a system preset current value, wherein the system preset current value corresponds to the system temperature threshold value.

Optionally, before the step of comparing the first temperature value with a preset first temperature threshold, the method further comprises:

and receiving the temperature threshold value and the threshold current configuration data sent by the micro control unit.

Optionally, after the step of controlling the driving current output by the driving chip to the mini light emitting diode to decrease to a first preset current value, the method further includes:

acquiring a second temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection;

and if the second temperature value is higher than a preset second temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a second preset current value, wherein the second temperature threshold value is higher than the first temperature threshold value, the second preset current value corresponds to the second temperature threshold value, and the second preset current value is smaller than the first preset current value.

Optionally, after the step of controlling the driving current output by the driving chip to the mini light emitting diode to decrease to a second preset current value, the method further includes:

acquiring a third temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection;

if the third temperature value is higher than a preset third temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a third preset current value, and/or closing part or all channels of the driving current output by the driving chip to the mini light emitting diode, wherein the third temperature threshold value is higher than the second temperature threshold value, the third preset current value corresponds to the third temperature threshold value, and the third preset current value is smaller than the second preset current value.

The application provides a backlight control method which is also applied to a backlight control system, wherein the backlight control system comprises a micro control unit and a plurality of driving chips, each driving chip is respectively integrated with a temperature detection module, each driving chip forms a plurality of driving chip groups, and each driving chip group is respectively connected with the micro control unit;

The backlight control method further comprises the following steps:

receiving a maximum temperature value in the driving chip set, wherein the maximum temperature value is obtained by comparing and determining the respective first temperature value of each driving chip in the driving chip set, and the first temperature value is obtained by detecting the temperature of the driving chip by the temperature detection module;

comparing the maximum temperature value with a preset system temperature threshold value, and if the maximum temperature value is higher than the system temperature threshold value, controlling a driving chip corresponding to the maximum temperature value to reduce the driving current output by the mini light emitting diode to a system preset current value, wherein the system preset current value corresponds to the system temperature threshold value.

Optionally, the method further comprises:

and sending temperature threshold value and threshold current configuration data to each driving chip.

In addition, in order to achieve the above object, the present application further provides a backlight control system, which includes a driving chip integrated with a temperature detection module and a mini light emitting diode;

the driving chip is used for acquiring a first temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection; comparing the first temperature value with a preset first temperature threshold value; and if the first temperature value is higher than the first temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, wherein the first preset current value corresponds to the first temperature threshold value;

The backlight control system also comprises a micro control unit, wherein the micro control unit is connected with a driving chip set consisting of a plurality of driving chips;

the micro control unit is used for receiving a maximum temperature value in the driving chip set, wherein the maximum temperature value is obtained by comparing and determining first temperature values of the driving chips in the driving chip set, and the first temperature values are obtained by detecting the temperature of the driving chips by the temperature detection module; and comparing the maximum temperature value with a preset system temperature threshold, and if the maximum temperature value is higher than the system temperature threshold, controlling a driving chip corresponding to the maximum temperature value to reduce the driving current output to the mini light emitting diode to a system preset current value, wherein the system preset current value corresponds to the system temperature threshold.

Wherein, each functional module of the backlight control system realizes the steps of the backlight control method when running.

In addition, to achieve the above object, the present application further provides a terminal device including: the backlight control system comprises a memory, a processor and a backlight control program which is stored in the memory and can run on the processor, wherein the backlight control program realizes the steps of the backlight control method when being executed by the processor.

In addition, in order to achieve the above object, the present application also proposes a storage medium having stored thereon a backlight control program which, when executed by a processor, implements the steps of the backlight control method as described above.

The embodiment of the application provides a backlight control method, a system, a terminal device and a storage medium, which are applied to a backlight control system, wherein the backlight control system comprises a driving chip integrated with a temperature detection module and a mini light emitting diode; the backlight control method comprises the following steps: acquiring a first temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection; comparing the first temperature value with a preset first temperature threshold value; and if the first temperature value is higher than the first temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, wherein the first preset current value corresponds to the first temperature threshold value.

Compared with a traditional backlight control system, the reliability of the backlight control system is guaranteed in a derating use mode by adopting a larger number of driving chips, the driving chips integrated with the temperature detection module are configured in the backlight control system, the temperature detection module is used for detecting the temperature of the driving chips to obtain a plurality of first temperature values of the driving chips, the obtained plurality of first temperature values are respectively compared with a preset first temperature threshold value, and when the first temperature value of any driving chip is higher than the first temperature threshold value, the driving chips are controlled to reduce the driving current output by the driving chips to the mini light emitting diode to a first preset current value, and the first preset current value corresponds to the first temperature threshold value.

Therefore, the embodiment of the application dynamically adjusts the driving current of the AM Mini-LED by acquiring the temperature change of the driving chip in the backlight control system so as to fully release the performance of the driving chip and reduce the number of the driving chips required for producing the AM Mini-LED product, thereby reducing the production cost of the AM Mini-LED on the basis of ensuring the reliability of the AM Mini-LED.

Drawings

Fig. 1 is a schematic device structure diagram of a hardware operating environment of a terminal device according to an embodiment of the present application;

FIG. 2 is a system block diagram of an embodiment of a backlight control method according to the present application;

FIG. 3 is a schematic view of a lamp panel according to an embodiment of a backlight control method of the present disclosure;

FIG. 4 is a flow chart of an embodiment of a backlight control method according to the present application;

FIG. 5 is a schematic diagram of a driving chip according to an embodiment of a backlight control method of the present disclosure;

FIG. 6 is a schematic diagram of a control system according to an embodiment of a backlight control method of the present disclosure;

fig. 7 is a schematic diagram of a functional module of an embodiment of a backlight control method of the present application.

The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is correspondingly changed.

In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, descriptions such as those related to "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated in this application. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

The embodiment of the application provides a terminal device.

As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment of a terminal device according to an embodiment of the present application.

It should be noted that the terminal device provided in the embodiment of the present application may be a Mini-LED television or other electronic products using a Mini-LED screen, where a backlight control system is integrated on the terminal device provided in the embodiment of the present application, and the backlight control system includes a micro control unit and a plurality of driving chips, each driving chip is integrated with a temperature detection module, each driving chip forms a plurality of driving chip sets, and each driving chip set is connected with the micro control unit of the backlight control system respectively.

Mini-LED is one type of LED screen, and refers to an LED device with a chip size of 50-200 μm. With the development of Mini-LED technology, the current market applies the Mini-LED backlight technology to televisions, flat plates, notebook computer screens and the like more and more, and compared with the traditional liquid crystal screen, the Mini-LED backlight screen has higher brightness and contrast, and can bring higher-definition and comfortable experience to users.

As shown in fig. 1, in a hardware operating environment of a terminal device, the terminal device may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.

It will be appreciated by those skilled in the art that the terminal device structure shown in fig. 1 is not limiting of the device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.

As shown in fig. 2, in an internal system of an Am Mini-LED tv, the Am Mini-LED tv may include: the LED display panel comprises a power panel, a main board, a control panel, a T-CON (screen driving circuit) and a Mini-LED lamp panel integrated with a Driver IC (driving chip) on the panel. The power panel mainly supplies power to the main board, the control board and the Mini-LED lamp panel; the main function of the control panel is to convert the brightness information sent by the main board and send the converted brightness information to the Driver IC on the corresponding lamp panel, and the Driver IC controls the current of the LEDs in the corresponding partition to achieve the corresponding brightness, wherein each partition can be designed into a single LED, a string of LEDs or a plurality of groups of LEDs which are connected in series and then connected in parallel.

The backlight source of the Mini-LED television consists of thousands of Mini-LED lamps, and in order to facilitate production and design, the backlight source is generally and uniformly divided into a plurality of lamp panels, and the lamp panels with different numbers can be divided according to practical application. In order to facilitate wiring and reduce cost interference in factories, driver ICs of Mini-LED lamps are directly placed on the lamp panels, as shown in fig. 3, each lamp panel can be designed in the same way, and share the same PCB (Printed Circuit Board printed circuit board), thereby facilitating production and after-sales maintenance.

As shown in fig. 1, an operating system, a network communication module, a user interface module, and a backlight control program may be included in a memory 1005, which is one type of computer storage medium.

In the device shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server, and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call a backlight control program stored in the memory 1005 to perform the following operations:

Optionally, the processor 1001 may be further configured to invoke a backlight control program stored in the memory 1005, and after executing the step of acquiring the first temperature value of the driving chip obtained by performing temperature detection on the driving chip by using the temperature detection module, further perform the following operations:

Optionally, the processor 1001 may be further configured to invoke a backlight control program stored in the memory 1005, and before performing the step of comparing the first temperature value with a preset first temperature threshold value, perform the following operations:

Optionally, the processor 1001 may be further configured to invoke a backlight control program stored in the memory 1005, and after performing the step of controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, perform the following operations:

Optionally, the processor 1001 may be further configured to invoke a backlight control program stored in the memory 1005, and after performing the step of controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a second preset current value, perform the following operations:

Optionally, the processor 1001 may be further configured to invoke a backlight control program stored in the memory 1005 to perform the following operations:

Based on the above hardware structure, the overall concept of each embodiment of the backlight control method of the present application is presented.

The Mini-LED backlight technology is divided into an AM Mini-LED and a PM Mini-LED, in practical application, because the LED partition of the AM Mini-LED is higher, better watching experience can be brought to users, but a driving chip of the AM Mini-LED is placed in a backlight module, the heat dissipation condition is poor, the packaging of the driving chip is smaller, the specification is smaller, and manufacturers of the AM Mini-LED are required to de-rate the driving chip of the AM Mini-LED for ensuring the reliability of the AM Mini-LED, so that the stress (electric stress and temperature stress) born by the application of the components is lower than the rated value of the components, thereby delaying the parameter degradation of the components and prolonging the service life. However, more driving chips are needed to drive the AM Mini-LEDs, so that the problem of high production cost of the AM Mini-LEDs is caused.

In view of the above phenomena, the present application provides a backlight control method applied to a backlight control system, where the backlight control system includes a driving chip integrated with a temperature detection module and a mini light emitting diode; the backlight control method comprises the following steps: acquiring a first temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection; comparing the first temperature value with a preset first temperature threshold value; and if the first temperature value is higher than the first temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, wherein the first preset current value corresponds to the first temperature threshold value.

Compared with the traditional backlight control system, the drive chip integrated with the temperature detection module is configured in the backlight control system by adopting a mode of using a larger number of drive chips in a derating mode, the temperature detection module is used for detecting the temperature of the drive chip to obtain a plurality of first temperature values of the drive chips, the obtained first temperature values are respectively compared with a preset first temperature threshold value, and when the first temperature value of any drive chip is higher than the first temperature threshold value, the drive chip is controlled to reduce the drive current output to the AM Mini-LED to a first preset current value corresponding to the first temperature threshold value.

Therefore, the driving current of the AM Mini-LED is dynamically adjusted by acquiring the temperature change of the driving chip in the backlight control system, so that the performance of the driving chip is fully released, the number of the driving chips required in the process of producing the AM Mini-LED product is reduced, and the production cost of the AM Mini-LED is reduced on the basis of ensuring the reliability of the AM Mini-LED.

Based on the above general conception of the backlight control method of the present application, various embodiments of the backlight control method of the present application are presented.

Referring to fig. 4, fig. 4 is a flowchart illustrating an embodiment of a backlight control method of the present application. It should be noted that although a logical order is shown in the flowchart, in some cases, the individual steps of the backlight control method of the present application may of course be performed in an order different from that herein.

In this embodiment, the backlight control method is applied to a backlight control system, and the backlight control system includes a driving chip integrated with a temperature detection module and a mini light emitting diode.

In this embodiment, the backlight control system may be an AM Mini-LED backlight control system, the Mini light emitting diode is an AM Mini-LED, and the driving chip is an AM driving chip.

In this embodiment, the backlight control method includes:

step S10, acquiring a first temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection;

in this embodiment, the driving chip of the AM Mini-LED is placed on the lamp panel, and drives the Mini-LEDs of the plurality of partitions through the plurality of LED channels configured by the driving chip, and each driving chip is integrated with a temperature detection module for detecting the temperature of the driving chip. When the driving chip drives the Mini-LED to finish lighting with preset brightness information, the current first temperature value of the driving chip is read through the configured temperature detection module.

In this embodiment, as shown in fig. 5, the internal structure of the driving chip in this embodiment is composed of main functional modules such as a Digital controller (Digital controller), a PWM Generator (PWM Generator), an internal Oscillator (Oscillator), an LED fault checking module (LED fault detection), an LED driving module (LED driver), a Signal interface (Signal interface), and a temperature detecting module (Temperature detection). The digital controller is responsible for signal processing and control, and realizes LED drive control and various protection functions. The PWM generator is responsible for generating PWM functions to realize LED PWM dimming control. An internal Oscillator (Oscillator) is responsible for generating a stable clock signal that provides a reference clock to the overall IC system. The LED fault detection module (LED fault detection) is responsible for fault detection of LED Open circuit (Open), short circuit (short), over-temperature (OTP) and the like. The LED driving module (LED Drivers) realizes constant current driving of a plurality of LED channels (LED 1, LED2, LED3 and LEDn) and realizes a dimming function. The Signal interface (Signal interface) is responsible for communication and data transfer with the controller MCU (Micro controller Unit micro control unit). The temperature detection module is responsible for the temperature detection of the driving chip.

Step S20, comparing the first temperature value with a preset first temperature threshold value;

in this embodiment, the AM driver chip will read its current first temperature value in real time while turning on the Mini-LED, and compare the value with a preset first temperature threshold after reading the first temperature value.

It should be noted that, in this embodiment, the driving chip may compare the temperature value with the temperature threshold immediately after each time the temperature value is obtained, or may set a certain time period, and the driving chip may first obtain the maximum value in the temperature read by the temperature detection module in the time period, and then compare the maximum value with the temperature threshold.

And step S30, if the first temperature value is higher than the first temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, wherein the first preset current value corresponds to the first temperature threshold value.

In this embodiment, the driving chip performs constant current driving on the AM Mini-LEDs of the multiple partitions through the multiple LED channels, and when the driving chip determines that the current first temperature value of the driving chip is higher than the first temperature threshold, the driving chip immediately reduces the driving current output by the driving chip to the LED channels to a first preset current value, that is, controls the driving current output by the driving chip to each partition AM Mini-LED driven by the driving chip to be reduced to the first preset current value.

In a possible embodiment, the specification of a driving chip in an AM Mini-LED backlight control system is 50mA, after a power supply is turned on, the driving current output by the driving chip to the AM Mini-LED is 50mA, a first temperature threshold value preset for the driving chip in the backlight control system is 80 ℃, a first preset current value is set to be 40mA, in the operation process, the driving chip lights the Mini-LED according to brightness information, meanwhile, a plurality of driving chips read the temperature value of the driving chip through a temperature detection module and compare the temperature value with the temperature threshold value, and when any driving chip determines that the current temperature value of the driving chip is higher than 80 ℃, the driving chip controls the current output by the driving chip to an LED channel to be reduced from the initial 50mA to 40mA.

In this embodiment, the present application is applied to a backlight control system, which includes a driving chip integrated with a temperature detection module and a mini light emitting diode; the backlight control method comprises the following steps: acquiring a first temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection; comparing the first temperature value with a preset first temperature threshold value; and if the first temperature value is higher than the first temperature threshold value, controlling the driving current output by the driving chip to the AM Mini-LED to be reduced to a first preset current value, wherein the first preset current value corresponds to the first temperature threshold value.

Specifically, compared with a traditional backlight control system, the reliability of the backlight control system is guaranteed by adopting a mode of derating by adopting a plurality of driving chips, the LED control system is characterized in that the driving chips are used for driving Mini-LEDs to finish lighting according to preset brightness information, meanwhile, the current first temperature value of the LED control system is read through the configured temperature detection module, then the driving chips are used for comparing the current first temperature value with the preset first temperature threshold value after reading the first temperature value, and finally, when the driving chips determine that the current first temperature value of the driving chips is higher than the first temperature threshold value, the driving chips immediately reduce the driving current output to the LED channels to the first preset current value, namely, the driving current output to each partition AM Mini-LED by the driving chips is controlled to be reduced to the first preset current value.

Further, based on the above-described first embodiment of the backlight control method of the present application, a second embodiment of the backlight control method of the present application is proposed.

In this embodiment, the backlight control system further includes a micro control unit, where the micro control unit is connected to a driving chipset formed by serially communicating a plurality of driving chips with each other.

In the present embodiment, in the step S10 described above: after obtaining the first temperature value of the driving chip, which is obtained by the temperature detection module for the temperature detection of the driving chip, the backlight control method further comprises the following steps:

step A10: comparing the first temperature value of each driving chip in the driving chip group to determine the maximum temperature value in the driving chip group;

in this embodiment, after the driving chip in the backlight control system obtains the first temperature value of the driving chip, the first temperature value can also be transmitted through serial communication between the driving chip and the driving chip in the same group, and the maximum temperature value in the driving chip set is determined by comparing the temperature value of the driving chip with the received temperature value.

Step A20: and transmitting the maximum temperature value to the micro control unit so that the micro control unit compares the maximum temperature value with a preset system temperature threshold value, and if the maximum temperature value is higher than the system temperature threshold value, controlling a driving chip corresponding to the maximum temperature value to reduce the driving current output by the driving chip to the mini light emitting diode to a system preset current value, wherein the system preset current value corresponds to the system temperature threshold value.

In this embodiment, after determining the maximum temperature value in the chipset, the driving chip in the backlight control system transmits the maximum temperature value to the micro control unit in the backlight control system, so that the micro control unit compares the maximum temperature value with a preset system temperature threshold, and if the maximum temperature value is higher than the system temperature threshold, the driving current output by the driving chip corresponding to the maximum temperature value to the AM Mini-LED is controlled to be reduced to a system preset current value, where the system preset current value corresponds to the system temperature threshold.

In this embodiment, the micro control unit is connected to the plurality of driving chipsets, and may receive the respective maximum temperature values of the plurality of driving chipsets, and when the micro control unit determines that the maximum temperature value of any one of the chipsets is higher than the system temperature threshold value of 80 ℃, the micro control unit controls the driving chip corresponding to the maximum temperature value to reduce the output driving current to the preset current value of 40mA, so that the driving chip reduces the working temperature.

It should be noted that, in this embodiment, the driving chip compares the first temperature values read by the temperature detection modules when receiving the temperature reading instruction to determine the maximum temperature value and transmit the maximum temperature value to the micro control unit, if the driving chip does not receive the temperature reading instruction, the driving chip only needs to directly control the reduction of the driving current according to the self first temperature value detected by the temperature detection module, according to the actual application requirement, the user may set the system temperature threshold and the first temperature threshold to the same value, set the system preset current value and the first preset current value to the same value, or set the system temperature threshold and the system preset current value to other values, which is not limited in this application specifically.

Optionally, in a possible embodiment, in step S20 above: before comparing the first temperature value with the preset first temperature threshold value, the backlight control method further comprises the following steps:

step A30: and receiving the temperature threshold value and the threshold current configuration data sent by the micro control unit.

In this embodiment, after the driving chip of the backlight control system is powered on, the driving chip receives a temperature threshold value and threshold current configuration data sent by the micro control unit, where the configuration data includes a first temperature threshold value and a first preset current value, and after receiving the configuration data, the driving chip may compare the self temperature value with the first temperature threshold value, and reduce the driving current to the first preset current value corresponding to the first temperature threshold value when the self temperature exceeds the first temperature threshold value.

In this embodiment, the method is applied to a backlight control system, and the maximum temperature value in the driving chip set is determined and transmitted to a micro control unit in the backlight control system, so that the micro control unit controls the driving chip corresponding to the temperature value to reduce the driving current output to an AM Mini-LED according to the received temperature value, and the micro control unit reads the temperature value of the driving chip with the highest temperature in each group of driving chips connected in series, so as to perform intelligent regulation of the system, and acquire the state of the whole Mini-LED backlight system and the performance release condition of the driving chip. In the HDR (high dynamic range), compared with the traditional scheme, the release capability of the driving chip can be further improved, and the brightness of the Mini-LED backlight is instantaneously improved.

Therefore, the maximum temperature value of each group of driving chips is transmitted to the micro control unit, so that the working temperature of the driving chips is accurately detected and controlled through the micro control unit, the performance of the driving chips of the backlight control system is released in a percentage, and the allowance is not reserved. Meanwhile, the micro control unit can detect the condition that the temperature of the driving chip is highest in real time, and conduct intelligent dynamic adjustment, so that the performance and reliability of the system are greatly improved.

Further, based on the first embodiment and/or the second embodiment of the backlight control method of the present application described above, a third embodiment of the backlight control method of the present application is proposed.

In this embodiment, after the step of "controlling the driving current output by the driving chip to the mini light emitting diode to decrease to the first preset current value" in the step S30, the backlight control method further includes:

step B10: acquiring a second temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection;

in this embodiment, after the driving chip having reached the first temperature threshold reduces the driving current output to the AM Mini-LED, the temperature of the driving chip can be suspended from rising, but as the working time is prolonged, the temperature value of the driving chip still continues to rise, and then the driving chip continues to read the second temperature value after the driving current is reduced by the driving chip through the temperature detection module.

Step B20: and if the second temperature value is higher than a preset second temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a second preset current value, wherein the second temperature threshold value is higher than the first temperature threshold value, the second preset current value corresponds to the second temperature threshold value, and the second preset current value is smaller than the first preset current value.

In this embodiment, the driving chip for driving the Mini-LED with the first preset current value continues to read the second temperature value through the temperature detection module, compares the read second temperature value with a preset second temperature threshold value, and immediately reduces the driving current output by the driving chip to the LED channel to a second preset current value corresponding to the second temperature threshold value when the driving chip determines that the second temperature value is higher than the second temperature threshold value, wherein the second temperature threshold value is higher than the first temperature threshold value, and the second preset current value is smaller than the first preset current value.

Optionally, in a possible embodiment, after the step of "controlling the driving current output by the driving chip to the mini light emitting diode to decrease to the second preset current value" in the step B20, the backlight control method further includes:

Step B30: acquiring a third temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection;

in this embodiment, after the driving chip reduces the driving current to the second preset current value, the temperature value of the driving chip still continues to rise along with the extension of the working time, and then the driving chip continues to read the third temperature value after the driving current is reduced secondarily by the temperature detection module.

Step B40: if the third temperature value is higher than the preset third temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a third preset current value, and/or closing part or all channels of the driving current output by the driving chip to the mini light emitting diode, wherein the third temperature threshold value is higher than the second temperature threshold value, and the third preset current value is smaller than the second preset current value.

In this embodiment, after the driving chip reduces the driving current of the driving chip to a second preset current value, the driving chip continues to read the third temperature value of the driving chip, compares the read third temperature value with a preset third temperature threshold value, and when the driving chip determines that the third temperature value of the driving chip is higher than the third temperature threshold value, immediately reduces the driving current output by the driving chip to the LED channel to a third preset current value corresponding to the third temperature threshold value, or the driving chip keeps the second preset current value to output the driving current to the Mini-LED and closes part of or all LED channels outputting the driving current of the driving chip, wherein the third temperature threshold value is higher than the second temperature threshold value, and the third preset current value is smaller than the second preset current value.

In another possible embodiment, when the driving chip determines that the third temperature value of the driving chip is higher than the third temperature threshold value, the driving current may be reduced to a third preset current value at the same time, and part or all of the LED channels are turned off, so that the chip is cooled down quickly.

It should be noted that in this embodiment, each driving chip has a plurality of LED channels, each LED channel is connected to a partitioned Mini-LED, when the driving chip determines that its own third temperature value is higher than a third temperature threshold, in order to ensure that the driving chip can continue to operate, part of LED channels or all LED channels that output driving current to the Mini-LED are closed, when the temperature drops below the third temperature threshold, the closed channels are re-opened, and in the actual use process, a user can set a specific channel closing number.

For example, in the present embodiment, the specification of the driving chip is 50mA, compared with the conventional backlight control system in which the driving chip is derated to 35mA (75% of the usage rule of the driving chip) for use to ensure reliability, the driving chip is used with a driving current of 50mA after power-up in the present embodiment, in the use process, when the temperature of the driving chip is increased to 80 ℃, the driving current is reduced to 45mA (90% of the usage rule of the driving chip) for continued use, when the driving chip is increased to 100 ℃, the driving current is reduced to 40mA (80% of the usage rule of the driving chip) for continued use, and when the operating temperature of the driving chip is increased to 120 ℃, the driving current is reduced to 35mA (75% of the usage rule of the driving chip) for continued use, and part of LED channels of the driving chip may be turned off for reducing loss.

In this embodiment, the method is applied to a backlight control system, and by setting temperature thresholds of different gears for the driving chip, a small amount of reduction of the driving chip can be ensured when the driving current value is reduced for the first time, so that the phenomenon that the performance of the driving chip is not obvious due to too much reduction current of the driving chip is prevented, and based on actual use requirements, a user can set the temperature thresholds and the current values of three gears and can set other gears to finish adjustment of the AM Mini-LED driving current.

Further, based on the first embodiment and/or the second embodiment and/or the third embodiment of the backlight control method of the present application described above, a fourth embodiment of the backlight control method of the present application is proposed.

In this embodiment, the backlight control method is applied to a backlight control system, where the backlight control system includes a micro control unit and a plurality of driving chips, each of the driving chips is integrated with a temperature detection module, each of the driving chips forms a plurality of driving chip sets, and each of the driving chip sets is connected to the micro control unit.

As shown in fig. 6, the backlight control system includes a main board, a control board (including a micro control unit), a lamp panel (including a driving chip), and a power panel, wherein, a commercial power (generally 220V) supplies power to the power panel through an ac socket, and the main function of the power panel is to convert an ac input voltage into a dc voltage to supply power to the system. And the output 12V supplies power to the main board and the control board, and the output 20V supplies power to the power amplifier of the main board. An adjustable output voltage (V_LED) is output to supply power to Mini-LEDs and the like on the lamp panel through the control panel. The main board provides control signals and power standby signals for a control board (comprising a micro control unit). The main board sends signals to the micro control unit of the constant current control system through SPI (Serial Peripheral Interface serial peripheral interface) according to the brightness distribution and characteristics of pictures in television signals, and the micro control unit sends brightness information sent by the main board to a corresponding driving chip on the lamp panel in real time, so that the brightness of a corresponding backlight area is controlled in real time, and the effect of accurately controlling Mini-LED backlight is achieved.

The backlight control method further comprises the following steps:

step C10: receiving a maximum temperature value in the driving chip set, wherein the maximum temperature value is obtained by comparing and determining the respective first temperature value of each driving chip in the driving chip set, and the first temperature value is obtained by detecting the temperature of the driving chip by the temperature detection module;

In this embodiment, the micro control unit in the backlight control system is in communication connection with a plurality of driving chip sets, and the driving chips in each driving chip set are connected in series. After the backlight control system is electrified, the micro control unit receives a maximum temperature value sent by the driving chip set, wherein the maximum temperature value sent by the driving chip set is obtained by comparing first temperature values of chips in the set, and the first temperature values are temperatures of the driving chips in the set, which are detected by the temperature detection module respectively.

Step C20: comparing the maximum temperature value with a preset system temperature threshold value, and if the maximum temperature value is higher than the system temperature threshold value, controlling a driving chip corresponding to the maximum temperature value to reduce the driving current output by the mini light emitting diode to a system preset current value, wherein the system preset current value corresponds to the system temperature threshold value.

In this embodiment, after receiving the maximum temperature value transmitted by the driving chipset, the micro control unit of the AM Mini-LED controls the corresponding target driving chip to reduce the driving current to the AM Mini-LED according to the maximum temperature value, specifically, the micro control unit determines that any received maximum temperature value is higher than the system temperature threshold, and then the micro control unit controls the driving chip in the driving chipset corresponding to the maximum temperature value to reduce the output driving current to the system preset current value, so that the driving chip reduces the working temperature.

In addition, in a possible embodiment, the micro control unit compares the received maximum temperature value with the temperature threshold, if it is determined that the maximum temperature value is greater than the system temperature threshold, the driving chip corresponding to the maximum temperature value is controlled to reduce the driving current to a preset current value of the system, where the preset current value of the system may be consistent with the first temperature threshold, the preset current value of the system may be consistent with the first preset current value of the system, a new temperature threshold and a new current value may also be set, and the micro control unit may also set a multi-stage temperature threshold and a multi-stage driving current value for the received maximum temperature value.

It should be noted that, in this embodiment, the micro control unit may also read the temperature value of each driving chip, but this takes a long time, resulting in serious tailing of the AM Mini-LED backlight. In order to simplify the processing time of the control system, more time is used for processing the acceptance and distribution of brightness information by the control panel, the one-to-one correspondence between Mini-LED backlight and liquid crystal display is realized, and the drive chip with the highest temperature returned by each group of drive chip groups is read by the micro control unit so as to reduce the processing time.

Optionally, in a possible embodiment, the backlight control method further includes:

step C30: and sending temperature threshold value and threshold current configuration data to each driving chip.

In this embodiment, a micro control unit in a backlight control system receives a setting instruction input from the outside, sets a temperature threshold and threshold current configuration data according to the instruction, and sends the configuration data to each driving chip after the micro control unit sets the configuration data, where the configuration data includes a first temperature threshold and a corresponding first preset current value, and the driving chip can compare the obtained first temperature value with the first temperature threshold after receiving the configuration data, and control the driving current output to the AM Mini-LED by itself to be reduced to the first preset current value when the first temperature value is higher than the first temperature threshold.

It should be noted that, in this embodiment, the configuration data sent by the micro control unit in the backlight control system to each driving chip further includes a second temperature threshold, a corresponding second preset current value, a third temperature threshold and a corresponding third preset current value, so that the driving chip can dynamically adjust the driving current according to the temperature thresholds of different gear positions, so as to fully release the performance of the driving chip.

In an exemplary embodiment, the micro control unit may set the first temperature threshold, the second temperature threshold and the third temperature threshold of the driving chip according to the setting instruction, specifically may set the third temperature threshold to 80 ℃, 100 ℃, 120 ℃ respectively, set the corresponding threshold current value for each temperature threshold, and based on the actual use requirement, the user may set the temperature threshold of the driving chip to other temperature values, or set the temperature threshold of more gears, which is not limited in particular.

In this embodiment, the present application is applied to a backlight control system, where the backlight control system includes a micro control unit and a plurality of driving chips, each driving chip is integrated with a temperature detection module, each driving chip forms a plurality of driving chip sets, and each driving chip set is connected to the micro control unit respectively; according to the method, the temperature value of the driving chip with the highest temperature in each group of driving chips connected in series is read through the micro control unit, intelligent adjustment of the system is performed, and the state of the whole Mini-LED backlight system and the performance release condition of the driving chips are obtained. In the HDR (high dynamic range), compared with the traditional scheme, the release capability of a driving chip can be further improved, and the brightness of the Mini-LED backlight is instantaneously improved.

Therefore, the performance of the driving chip of the backlight control system can be released in percentage through the accurate detection and control of the micro control unit on the working temperature of the driving chip, and the allowance is not required to be reserved. Meanwhile, the micro control unit can detect the condition that the temperature of the driving chip is highest in real time, and conduct intelligent dynamic adjustment, so that the performance and reliability of the system are greatly improved.

In addition, referring to fig. 7, the embodiment of the present application further provides a backlight control system, where the backlight control system includes a driving chip integrated with a temperature detection module and a mini light emitting diode;

the driving chip is used for acquiring a first temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection; comparing the first temperature value with a preset first temperature threshold value; and if the first temperature value is higher than the first temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a first preset current value, wherein the first preset current value corresponds to the first temperature threshold value.

The driving chip is further used for comparing the first temperature value of each driving chip in the driving chip set to determine the maximum temperature value in the driving chip set; and transmitting the maximum temperature value to the micro control unit so that the micro control unit compares the maximum temperature value with a preset system temperature threshold value, and if the maximum temperature value is higher than the system temperature threshold value, controlling a driving chip corresponding to the maximum temperature value to reduce the driving current output by the driving chip to the mini light emitting diode to a system preset current value, wherein the system preset current value corresponds to the system temperature threshold value.

Optionally, the driving chip is further configured to receive temperature threshold value and threshold current configuration data sent by the micro control unit.

Optionally, the driving chip is further configured to obtain a second temperature value of the driving chip, where the second temperature value is obtained by the temperature detection module by performing temperature detection on the driving chip; and acquiring a third temperature value of the driving chip, which is obtained by the temperature detection module for the driving chip through temperature detection.

Optionally, the driving chip is further configured to control the driving current output by the driving chip to the mini light emitting diode to decrease to a second preset current value if the second temperature value is higher than a preset second temperature threshold, where the second temperature threshold is higher than the first temperature threshold, the second preset current value corresponds to the second temperature threshold, and the second preset current value is smaller than the first preset current value; and if the third temperature value is higher than a preset third temperature threshold value, controlling the driving current output by the driving chip to the mini light emitting diode to be reduced to a third preset current value, and/or closing part or all channels of the driving current output by the driving chip to the mini light emitting diode, wherein the third temperature threshold value is higher than the second temperature threshold value, the third preset current value corresponds to the third temperature threshold value, and the third preset current value is smaller than the second preset current value.

Optionally, the micro control unit is further configured to receive a maximum temperature value in the driving chipset, where the maximum temperature value is obtained by comparing and determining a first temperature value of each driving chip in the driving chipset, and the first temperature value is obtained by performing temperature detection on the driving chip by using the temperature detection module; and comparing the maximum temperature value with a preset system temperature threshold, and if the maximum temperature value is higher than the system temperature threshold, controlling a driving chip corresponding to the maximum temperature value to reduce the driving current output to the mini light emitting diode to a system preset current value, wherein the system preset current value corresponds to the system temperature threshold.

Optionally, the micro control unit is further configured to send temperature threshold value and threshold current configuration data to each driving chip.

The function implementation of each module in the backlight control system corresponds to each step in the embodiment of the backlight control method, and the function and implementation process of each module are not described in detail herein.

In addition, the present application also proposes a storage medium, on which an operation program of backlight control is stored, which when executed by a processor, implements the steps of the backlight control method of the present application as described above.

The specific embodiments of the storage medium are substantially the same as the embodiments of the backlight control method described above, and are not described herein.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method described in the embodiments of the present application.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.

Claims

1. The backlight control method is characterized in that the backlight control method is applied to a backlight control system, and the backlight control system comprises a driving chip integrated with a temperature detection module and a mini light emitting diode;

the backlight control method comprises the following steps:

2. The backlight control method according to claim 1, wherein the backlight control system further comprises a micro control unit connected to a driving chipset formed by mutually serially communicating a plurality of the driving chips;

3. The backlight control method according to claim 1, wherein prior to the step of comparing the first temperature value with a preset first temperature threshold value, the method further comprises:

4. The backlight control method according to claim 1, wherein after the step of controlling the driving current output from the driving chip to the mini light emitting diode to be reduced to a first preset current value, the method further comprises:

5. The backlight control method according to claim 4, wherein after the step of controlling the driving current output from the driving chip to the mini light emitting diode to be reduced to a second preset current value, the method further comprises:

6. The backlight control method is characterized by being applied to a backlight control system, wherein the backlight control system comprises a micro control unit and a plurality of driving chips, each driving chip is integrated with a temperature detection module, a plurality of driving chip groups are formed by each driving chip, and each driving chip group is connected with the micro control unit respectively;

the backlight control method further comprises the following steps:

7. The backlight control method according to claim 6, characterized in that the method further comprises:

8. The backlight control system is characterized by comprising a driving chip integrated with a temperature detection module and a mini light emitting diode;

9. A terminal device, characterized in that the terminal device comprises: a memory, a processor and a backlight control program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the backlight control method according to any one of claims 1 to 7.

10. A storage medium having stored thereon a backlight control program which, when executed by a processor, implements the steps of the backlight control method according to any one of claims 1 to 7.